Not about me asking for a friend!!

OK so my friend came to me today and was embarrassed to talk to me about this. I have no clue what it is so I thought I would see what you all think. ( with her permission) OK so she says this doesn't happen all the time but sometimes her vagina itches next to the whole. And once she scratches it, it will itch even more and drive her crazy. And it goes on and on. She said sometimes she will itch so much it burns to pee cuz she has scratched it for so long. What can she do to make it stop? What does it mean? And does anyone else experience it? Like I said I am no help to her so we need your opinions.